As we age, the transition between stages of development becomes more ________ in terms of defining milestones

You've arrived half an hour late to pick up a friend. She was scheduled to take an examination and even if you speed on the way to the university, she will now lose at least 20 minutes of the time she needs to complete the exam. According to the authors, what is the best thing to say when you arrive?

A) "Don't tell me that you've never overslept." B) "Don't forget, I am giving you a ride. You should still thank me." C) "It's only one exam, and you're doing well in that course so far, aren't you?" D) "I brought you some coffee and donuts to make it up to you." E) "It's all my fault. I overslept. I'm really sorry."

In a game of peek-a-boo, the infant's hearty laugh causes the mother to laugh. The mother's

laughter causes the infant to laugh louder. What caregiver behavior is captured in this interchange? A) social referencing B) emotion regulation C) emotion reactivity D) attunement